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Analog Devices Inc. AD9235BRUZ-20
- Part No.:
- AD9235BRUZ-20
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD9235BRUZ-20.pdf
- Description:
- IC ADC 12BIT PIPELINED 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:206
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Product details
Overview
AD9235BRUZ-20 from Analog Devices is a 12-bit, 20 MSPS analog-to-digital converter (ADC) with single 3 V supply operation, differential input bandwidth up to 500 MHz, on-chip reference and sample-and-hold amplifier (SHA), and guaranteed no missing codes over –40°C to +85°C. It delivers 70 dBc SNR and 85 dBc SFDR at Nyquist for ultrasound signal digitization and IF sampling in battery-powered communications receivers.
For engineers reviewing the AD9235BRUZ-20 datasheet, AD9235BRUZ-20 pinout, AD9235BRUZ-20 application, or AD9235BRUZ-20 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in medical and comms systems, and validated alternative options for 12-bit, 20 MSPS ADC migration paths.
Technical Context
The AD9235BRUZ-20 employs a multistage differential pipelined architecture with output error correction logic to achieve 12-bit accuracy at 20 MSPS while ensuring no missing codes across industrial temperature range. Its patented SHA supports both differential and single-ended analog inputs with user-selectable 1 Vp-p or 2 Vp-p full-scale ranges.
A dedicated clock duty cycle stabilizer (DCS) is not enabled in the -20 variant per datasheet Table 3; timing relies on externally controlled 50% ±10% duty cycle clock. Digital outputs are CMOS-compatible, configurable as offset binary or twos complement, with pipeline latency fixed at 7 cycles and aperture jitter of 0.5 ps rms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 discrete output codes with monotonic transfer function. |
| Max Sample Rate | 20 MSPS - supports baseband sampling up to 10 MHz Nyquist frequency. |
| SNR @ 2.4 MHz | 70.8 dBc typical - enables high-fidelity digitization of low-noise analog signals. |
| SFDR @ 2.4 MHz | 92.0 dBc typical - suppresses spurious content critical for spectral purity in IF receivers. |
| Power Consumption | 90 mW DC input - optimized for portable instrumentation with thermal constraints. |
| Analog Input Bandwidth | 500 MHz - preserves signal integrity for wideband applications including ultrasound front ends. |
| Differential Nonlinearity | ±0.35 LSB typical - ensures accurate amplitude representation without code gaps. |
| Supply Voltage Range | AVDD: 2.7–3.6 V - compatible with standard 3 V rail systems and low-voltage battery operation. |
Pinout & Package
AD9235BRUZ-20 is packaged in a 28-lead TSSOP (RU-28) with exposed paddle soldered to ground plane for thermal and EMI performance. Pin count and layout match industry-standard footprint for drop-in compatibility in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock Input | Single-ended CMOS/LVTTL input controlling all conversion cycles; requires stable edge timing. |
| VIN+, VIN– | Differential Analog Input | High-bandwidth (500 MHz) input pair accepting 1–2 Vp-p differential signals; supports single-ended via internal bias. |
| D0–D11 | Parallel Digital Output | 12-bit CMOS outputs in offset binary or twos complement format; DRVDD supports 2.5 V or 3.3 V logic levels. |
| OTR | Out-of-Range Indicator | Active-high flag signaling overflow beyond selected input range; used with MSB for polarity detection. |
| MODE | Data Format & DCS Control | Selects output coding (offset binary/twos complement); DCS disabled in -20 variant per datasheet. |
| SENSE, VREF, REFT, REFB | Reference Interface | Configures internal 1.0 V or 0.5 V reference; allows external reference bypass or differential reference mode. |
| PDWN | Power-Down Control | Active-high signal reducing power to 1.0 mW; wake-up time ≤3 ms with recommended decoupling. |
| AVDD, AGND, DGND, DRVDD | Power & Ground Rails | Separate analog/digital supplies minimize noise coupling; DRVDD decoupling mandates 0.1 µF + 10 µF capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3 V supply operation | Eliminates dual-supply design complexity and reduces BOM cost in portable medical and test equipment. |
| No missing codes guaranteed | Ensures deterministic data acquisition across full temperature range without calibration-dependent correction. |
| On-chip SHA and voltage reference | Reduces external component count and board area; enables rapid system integration without precision op-amp circuits. |
| Flexible analog input range | Supports 1 Vp-p or 2 Vp-p full-scale selection via SENSE/VREF configuration for optimal dynamic range matching. |
| Low power at 20 MSPS | 90 mW consumption enables thermally constrained designs such as handheld scopemeters and battery-powered instruments. |
| 7-cycle pipeline latency | Predictable, fixed delay simplifies real-time control loop timing and FIFO buffer sizing in digital signal processing chains. |
Applications
| Ultrasound Imaging Front End | IF Sampling in CDMA Receivers |
|---|---|
|
Use Scenario: Digitizing 5–15 MHz echo return signals from piezoelectric transducers in portable ultrasound systems. IC Role / Device Role / Timing Role: High-fidelity ADC capturing wideband RF echoes with minimal harmonic distortion and spurious content. Use Value: 500 MHz analog input bandwidth preserves transient fidelity; 70 dBc SNR ensures accurate tissue contrast resolution. |
Use Scenario: Downconverting and digitizing 45–46 MHz IF signals in IS-95/CDMA-One base station receivers. IC Role / Device Role / Timing Role: Intermediate-frequency sampling ADC enabling direct digital downconversion without analog mixers. Use Value: 92 dBc SFDR at 2.4 MHz prevents intermodulation artifacts from adjacent channel interference in dense RF environments. |
| Battery-Powered Handheld Scopemeter | Low-Cost Digital Oscilloscope |
|
Use Scenario: Real-time waveform capture in field-deployable test tools operating from Li-ion batteries for 8+ hours. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC providing 20 MSPS sampling for 10 MHz bandwidth visualization. Use Value: 90 mW power draw extends battery life; 12-bit resolution improves vertical sensitivity over 8-bit alternatives. |
Use Scenario: Entry-level bench oscilloscopes requiring cost-effective digitization of audio and control signals up to 10 MHz. IC Role / Device Role / Timing Role: Main acquisition ADC delivering sufficient ENOB and SNR for educational and service applications. Use Value: On-chip reference and SHA reduce bill-of-materials; TSSOP package enables compact, low-cost PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 20 MSPS ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9226ARZ | 12-bit, 65 MSPS, 3.3 V supply, no integrated reference, higher power (330 mW at 65 MSPS) | Higher speed but lacks on-chip reference and SHA; requires external precision reference and driver circuitry | Choose when system demands >20 MSPS sampling and external reference control is acceptable |
| ADS8325IPW | 16-bit, 100 kSPS, 5 V supply, SAR architecture, serial SPI interface, 1.25 mW power | Lower speed, higher resolution, serial output, and ultra-low power; incompatible pinout and interface | Choose for precision DC/low-frequency measurements where throughput is secondary to resolution and power |
Compared with AD9235BRUZ-20, AD9226ARZ offers higher sample rate but increases system complexity and power, while ADS8325IPW trades speed for resolution and serial simplicity-neither is pin-compatible, but both serve distinct segments of the precision data acquisition market.
Availability
AD9235BRUZ-20 is available at Aetrix Electronics and suitable for ultrasound imaging systems, IF sampling receivers, battery-powered test instruments, and low-cost digital oscilloscopes requiring stable component supply and long-term industrial temperature support.
Supply support for AD9235BRUZ-20 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD9235 family was designed specifically for high-speed, low-power, precision digitization in medical ultrasound, communications infrastructure, and portable instrumentation-emphasizing integrated functionality and industrial-grade reliability.
FAQ
What is the maximum analog input frequency supported by the AD9235BRUZ-20?
The AD9235BRUZ-20 features a 500 MHz analog input bandwidth, enabling accurate digitization of signals up to its Nyquist frequency of 10 MHz at 20 MSPS. Performance metrics such as SNR and SFDR are specified up to 100 MHz input, but usable full-scale response remains robust within the 500 MHz small-signal bandwidth limit defined in the datasheet.
Does the AD9235BRUZ-20 include an on-chip clock duty cycle stabilizer (DCS)?
No-the AD9235BRUZ-20 does not include an active clock duty cycle stabilizer. Per datasheet Table 3, DCS functionality applies only to the AD9235BRUZ-65 variant. The -20 model requires an externally generated clock with 40%–60% duty cycle to maintain specified AC performance.
What reference voltage options are available for the AD9235BRUZ-20?
The AD9235BRUZ-20 supports two internal reference modes: 1.0 V (default) and 0.5 V, selected via the SENSE pin. It also accepts external references applied to VREF, REFT, and REFB pins, allowing differential reference configurations or precision external voltage sources for improved stability.
Can the AD9235BRUZ-20 operate with a 2.5 V digital supply (DRVDD)?
Yes-the AD9235BRUZ-20 supports DRVDD from 2.25 V to 3.6 V, making it fully compatible with 2.5 V logic families. Digital outputs meet CMOS voltage thresholds at 2.5 V DRVDD, with high-level output voltage ≥2.45 V (IOH = 0.5 mA) and low-level output voltage ≤0.2 V (IOL = 1.6 mA).
Is the AD9235BRUZ-20 pin-compatible with other members of the AD9235 family?
Yes-AD9235BRUZ-20, AD9235BRUZ-40, and AD9235BRUZ-65 share identical 28-lead TSSOP pinouts and functional pin assignments. This allows hardware reuse across speed grades, simplifying design scalability and inventory consolidation for systems targeting different sampling rate requirements.
AD9235BRUZ-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 20M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.25V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9235BRUZ-20 FAQ
1.How can I place an order for AD9235BRUZ-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9235BRUZ-20 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD9235BRUZ-20 reliable?
The price and inventory of AD9235BRUZ-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9235BRUZ-20 is usually 5 days.
3.What payment methods are accepted for AD9235BRUZ-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9235BRUZ-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9235BRUZ-20?
AD9235BRUZ-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9235BRUZ-20 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD9235BRUZ-20?
For technical support, including AD9235BRUZ-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9235BRUZ-20 requirements.
6.How does Aetrix verify that AD9235BRUZ-20 is sourced from the original manufacturer or authorized distributors?
All AD9235BRUZ-20 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9235BRUZ-20 meets industry standards.
7.What is the process for return or replacement of AD9235BRUZ-20?
All AD9235BRUZ-20 units undergo pre-shipment inspection (PSI). If there is an issue with AD9235BRUZ-20, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD9235BRUZ-20 part is unused and in its original packaging.
Return procedure for AD9235BRUZ-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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